Bochum 2018 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 59: Nuclear Astrophysics IV

HK 59.6: Vortrag

Freitag, 2. März 2018, 15:15–15:30, HZO 100

Performance and testing of Ultra High Vacuum compatible silicon strip detectors at Gsi storage rings — •Laszlo Varga for the Uhv Si strip detectors collaboration — Gsi, Germany

In the nucleosynthesis of the so-called p nuclei radiative capture reactions like (p,γ) or (α,γ) play an important role to model the reaction network and to explain the stellar production yields in different explosive scenarios [1]. The storage rings at Gsi, the Experimental Storage Ring (Esr) and the Cryring, provide unrivaled opportunity to allow the corresponding reaction studies. Both grant the storage of sufficient amount of ions in a nearly background-free environment for reaction studies in inverse kinematics.

After the successful investigation of the cross section of 96Ru(p,γ) in 2009 [2] and the cross sections of 124Xe(p,γ) in 2016, the performance and commissioning of improved Esr and Cryring detection system designs are carried out for the first experiments in 2018. The particle detection with a nearly 100% efficiency is realized by ultra high vacuum (Uhv) compatible double-sided silicon strip detectors (Dsssd), which are excellent candidate to measure first time the proton-capture inside the Gamow-window using stored, radioactive ions.

References: [1] - M. Pignatari et al. 2016 Int. J. Mod. Phys. E 25 1630003 [2] - B. Mei et al., Phys. Rev. C92 (2015) 035803